Did you have symptoms of cardio-vascular disease (CVD), according to your doctor? This is a possible complication of uncontrolled diabetes and should probably be checked by a specialist.
If I understand your question correctly, you are now feeling a lot better and you want to know if the arteries are now working properly. This is probably not something that non-doctors can help you with.
Let's see if anyone has some good suggestions. There are probably some forum members who have first-hand experience of CVD and can provide some perspective.